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shear pin

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noun
an easily replaceable pin inserted in a machine at a critical point and designed to shear and stop the machine if the load becomes too great
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

How to use shear pin in a sentence

  • The damage was trivial; a shear pin in the transmission had given way.

    The Syndic|C.M. Kornbluth
  • Charles pried a shear pin from the jeep's winch, punched out the shear pin that had given way in the transmission and replaced it.

    The Syndic|C.M. Kornbluth
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